Golf club head

• US 20040176180A1
• Filed: 03/04/2004
• Published: 09/09/2004
• Est. Priority Date: 03/07/2003
• Status: Active Grant

• Current Assignee: Sumitomo Rubber Industries Limited
• Original Assignee: SRI Sports Limited (Sumitomo Rubber Industries Limited)
• Inventors: Kono, Masaru, Yamamoto, Akio, Yamaguchi, Tetsuo
• Granted Patent: US 7,331,877 B2
• Time in Patent Office: Days
• US Class Current: 473/324
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/0462 characterised by tapering thickness of the impact face plate
• CPC Class Codes: A63B 53/0466 wood-type

Abstract

A maximum resilience point (M) of a head (1) is positioned above a center (C) of a hitting surface. On the maximum resilience point (M), (t2−t1) measured in accordance with a pendulum test determined by USGA has a maximum value. When coordinates of the center (C) of the hitting surface are set to be (0, 0) and coordinates of the maximum resilience point (M) are set to be (x, y), y is greater than 0 mm and is equal to or smaller than 10 mm. The value of (t2−t1) on the maximum resilience point (M) is 250·10⁻⁶ second or more. The value of (t2−t1) on the center (C) of the hitting surface is smaller than 250·10⁻⁶ second. y may be set to be equal to or greater than −5 mm and to be smaller than 0 mm. x may be set to be equal to or greater than −10 mm and to be smaller than 0 mm. x may be set to be greater than 0 mm and to be equal to or smaller than 10 mm.

Claims

1. A golf club head in which when a horizontal direction from a toe side toward a heel side is set to be an X direction, a vertical and upward direction is set to be a Y direction, coordinates of a center of a hitting surface are set to be (0, 0) and coordinates of a maximum resilience point in the hitting surface are set to be (x, y), y is greater than 0 mm and is equal to or smaller than 10 mm.

2. The golf club head according to claim 1, wherein the y is 5 mm to 8 mm.

3. The golf club head according to claim 1, wherein a value of (t2−

t1) on the center of the hitting surface which is measured in accordance with a pendulum test determined by USGA is smaller than 250·

10<sup>−

6</sup> second.

4. The golf club head according to claim 1, wherein the value of (t2−

t1) on the maximum resilience point which is measured in accordance with the pendulum test determined by the USGA is 250·

10<sup>−

6</sup> second or more.

5. A golf club head in which when a horizontal direction from a toe side toward a heel side is set to be an X direction, a vertical and upward direction is set to be a Y direction, coordinates of a center of a hitting surface are set to be (0, 0) and coordinates of a maximum resilience point in the hitting surface are set to be (x, y), y is equal to or greater than −

5 mm and is smaller than 0 mm.

6. The golf club head according to claim 5, wherein the y is −

5 mm to −

2 mm.

7. The golf club head according to claim 5, wherein a value of (t2−

t1) on the center of the hitting surface which is measured in accordance with a pendulum test determined by USGA is smaller than 250·

10<sup>−

6</sup> second.

8. The golf club head according to claim 5, wherein the value of (t2−

t1) on the maximum resilience point which is measured in accordance with the pendulum test determined by the USGA is 250·

10<sup>−

6</sup> second or more.

9. A golf club head in which when a horizontal direction from a toe side toward a heel side is set to be an X direction, a vertical and upward direction is set to be a Y direction, coordinates of a center of a hitting surface are set to be (0, 0) and coordinates of a maximum resilience point in the hitting surface are set to be (x, y), x is equal to or greater than −

10 mm and is smaller than 0 mm.

10. The golf club head according to claim 9, wherein the x is −

8 mm to −

3 mm.

11. The golf club head according to claim 9, wherein a value of (t2−

t1) on the center of the hitting surface which is measured in accordance with a pendulum test determined by USGA is smaller than 250·

10<sup>−

6</sup> second.

12. The golf club head according to claim 9, wherein the value of (t2−

t1) on the maximum resilience point which is measured in accordance with the pendulum test determined by the USGA is 250·

10<sup>−

6</sup> second or more.

13. A golf club head in which when a horizontal direction from a toe side toward a heel side is set to be an X direction, a vertical and upward direction is set to be a Y direction, coordinates of a center of a hitting surface are set to be (0, 0) and coordinates of a maximum resilience point in the hitting surface are set to be (x, y), x is greater than 0 mm and is equal to or smaller than 10 mm.

14. The golf club head according to claim 13, wherein the x is 3 mm to 8 mm.

15. The golf club head according to claim 13, wherein a value of (t2−

t1) on the center of the hitting surface which is measured in accordance with a pendulum test determined by USGA is smaller than 250·

10<sup>−

6</sup> second.

16. The golf club head according to claim 13, wherein the value of (t2−

t1) on the maximum resilience point which is measured in accordance with the pendulum test determined by the USGA is 250·

10<sup>−

6</sup> second or more.